Re: [CAD_CAM_EDM_DRO] Re: Servo controllers for table top machines.

>> Also, brakes are used often in vertical load applications. Ballscrews
>> can be efficiently backdriven so when power is cut off, there is an
>> automatic spring brake to keep the Z axis from falling. High end
>> VMC's use a gas strut to do the same thing.
>>
>
> Absolutely dependant on the pitch of the screw. Try it with a fine pitch
> ballscrew, it wont move.
>

It all depends on the load. Also a fine pitch screw may not be suitable
(either due to load considerations or gearing). Most screws that can
take heavy loads are fairly coarse pitch.

Les